Fix bug where close button UMA is not reported for the Tab UI

Bug: 976352
Change-Id: I39ec8f4364554f7650a484c41d6134ac01a62d25
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2065423Reviewed-by: anthonyvd <anthonyvd@chromium.org>
Commit-Queue: Megan Jablonski <megjablon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743298}

chrome/browser/ui/views/translate/translate_bubble_view.cc

@@ -354,6 +354,7 @@ void TranslateBubbleView::ButtonPressed(views::Button* sender,
       break;
     }
     case BUTTON_ID_CLOSE: {
+      translate::ReportUiAction(translate::CLOSE_BUTTON_CLICKED);
       GetWidget()->Close();
       break;
     }